VAMP 257 - Page 94

VAMP 257 Feeder and motor manager
Technical description
VAMP Ltd
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VAMP 24h support phone : +358 (0)20 753 3264
VM257.EN002
Figure 2.3.15-1. Thermal overload protection
Setting parameters of thermal overload protection:
T> (49)
Parameter Value Unit Default Description
T> 0.50 … 1.20 xImode 1.06 Setting value T> (=k x In)
Alarm 60 … 99 % 90 Alarm setting T>
Tau 2 … 60 min 60
Heating/cooling time
constant
Tau2 1 … 10 xTau 1
Cooling time multiplier for
Tau
I
MAX40
0.7 … 1.2 xImode 1
Relative allowed overload
when Θ
AMB
is +40 °C
I
MAX70
0.5 … 1 xImode 0.78
Relative allowed overload
when Θ
AMB
is +70 °C
S_On
Enabled;
Disabled
- Enabled Start on event
S_Off
Enabled;
Disabled
- Enabled Start off event
T_On
Enabled;
Disabled
- Enabled Trip on event
T_Off
Enabled;
Disabled
- Enabled Trip off event
NOTE! Setting the values of I
MAX40
, I
MAX70
and Tau2 is possible only in
motor protection mode.
Measured and recorded values of thermal overload
protection:
T> (49)
Parameter Value Unit Description
Measured
value
T % Temperature rise
Display T> A Setting value T>
SCntr Cumulative start counter Recorded
values
TCntr Cumulative trip counter